The desktop with integrated Intel graphics works fine with XP. Just added ATi (Mobility) Radeon 9000 (PCI) card. Can't seem to find the driver (not on the CD, not on the Internet). With one monitor on each graphics controller, and the BIOS set to PCI/Internal Graphics, the computer boots up with the Radeon graphics-monitor, and Windows XP then runs on the Intel graphics-monitor.
Just can't get this to work right! If this works on WinXP, my next project is to have it work on Ubuntu 12.04 (or 14.04) - my preferred OS. Any and all help is welcome.